Reciprocating cylinder internal-combustion engine



Jan.l 11, v .L ZOCH, JR v REGIPROCATING CYLINDER INTERNAL-COMBUSTION ENGINE Filed Nov.' l5, 1946 img' 1 4 EL@ E E 'f la In vento:-

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Attorneys Patented Jan. 11, 1949 RCIPROCATING CYLINDER INTERNAL- COMBUSTION ENGINE Lawrence L. Zoch, Jr., Madison, Wis.

Application November 15, 1946, Serial No. 710,211

s claims. (c1. 12s-50)' This invention relates to the art of internal combustion engines of the type employing a double acting piston. i

An important object of the invention is to provide an engine of the double acting piston type wherein the parts are of simple construction and arranged in such a manner as to be readily accessible, positive acting and durable in operation. 1

Another object of the invention is to provide a double acting piston type engine, which because of its special construction and arrangement of parts, it is capable of being manufactured in a less over-all size than is possible in engines of this type heretofore marketed.

Still another object of the invention is to provide an engine of this character, wherein friction is reduced to a minimum, thus lessening wear and the occasion for periodic inspection and replacements.

These and various'other objects and advantages of the invention will become apparent to the reader of the following description.

In the drawing:

Figure 1 is a fragmentary vertical sectional view, through the engine;

Figure 2 is a section taken substantially on line 2-2 of Figure 1.

Referring to the drawing, numeral 5 denotes a base having side walls 6 and end walls 1, the end walls 1 having thickened portions 8, formed With opemngs to'receive portions of a cam shaft 9 having cams IIJ, II thereon, for operating the valves, later to be described.

A cylinder I2, is open at its bottom to receive a hollow piston I 3, which at its upper portion has suitable packing means I4 for riding contact with the inside of the cylinder I2. The cylinder I2 has a pair of depending legs I5 suitably secured as at I6 to lugs on the lower portion of the piston I3. Located within the hollow piston I3 is a short piston I1 having packing means I8, against which the inside of the piston I3 wipes, the piston I1 being held stationary through the medium of a pair of conduits I9, representing the intake and exhaust lines of the engine, these conduits I 9, 2B extending downwardly into the base 5 and laterally through the end walls 1, the conduits being held in place by flanges 2| bolted or otherwise secured as at 22, to the end Walls. The upper ends of the conduits open through the top of the inner stationary piston I1 where valves seats are located for accommodating intake and exhaust valves 23, 24, respectively, rods 25, 26 respectively, depending from thesevvalves and through the elbow portions 21 thereof to ride the cams I0, Il, springs 28, 29 respectively, being connected with these rods to normally urge the rods downwardly and with force against the cams I0, II. A spark plug 30 is provided in the top of the stationary cylinder I1.

A pin 3l extends through bearings 32 in the lower portion of the slide piston I3 and has its ends terminating` in bearings 33 at the lower ends of connecting rods 34, 34, which likewise have bearings at their upper ends for receiving the crank pins 35, 35 of crank arms 36, 36 at the ends of a shaft 31, which is journaled through a bifurcated block 38 on the top of the cylinder I2, there being a drive gear 39 partly opening within the bifurcated block 38 and being suitably keyed or secured in a desired manner to the shaft 31.

An intake valve 40 and an exhaust valve 4I are provided in the cylinder I2 and are provided, respectively, with stems 42 and 43 which are operated in conventional manner. A spark plug 44 is also provided in the cylinder I2.

In the operation of the engine using the double acting piston of the type above described, the piston I3 moves up in the cylinder I2, compressing the air and fuel mixture between their respective heads, and while air and fuel mixture is being drawn in the space between the respective heads of the piston I3 and the stationary piston I1, through an intake in the piston I1.

At the top of the stroke, the compressed gases between the pistons I2, I3 are ignited by a spark and combustion takes place, the expanding gas forcing the piston I3 downward, compressing the air and fuel mixture between the piston I3 and At the end of the down stroke, the compressed gases between the pistons I3 and `I1 are ignited and the expanding gases force the piston I3 upward and the gases between the pistons I2 and I3 are forced out the exhaust valve 4I in the cylinder I2.

On the following down stroke, the intake valve 4U in the cylinder I2 allows air and fuel to be taken in between the cylinder head and the piston I3 and the gas between the piston I3 and piston I1 are forced out the exhaust in the stationary piston I1.

While the foregoing description sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to, without dewhat is kstationary piston, ignition means in the chamber,

fuel intake and exhaust means on the stationary piston, a cylinder in which the slidable piston operates, supporting means for the cylinder; a crank shaft mounted on the cylinder and having power take-off means and connecting means between the crank shaft and the lower portion of the said slide piston, said connecting means corn-i prising a crank on each end of the crank shaft, a connecting rod extending from each crank, said slide piston being provided with bearings at its lower portion, a shaft extending through the bearings and to which the crank rods connect. v

2. An engine of ythe character described com prising a stationaryl piston, a base, supporting means on the base for the stationaryjpiston, a slide piston on the stationary piston containing a combustion chamber between itself and said stationary piston, ignition means in the chamber, fuel intake and exhaust means on the sta tionary piston, a cylinder in which the slidable piston operates, supporting means for the 'cylinder, a crank shaft mounted on the cylinder and having powertake-of means and connecting means between the 'crank shaft and the lower portion of the said slide piston, said intake and exhaust means consisting of conduits extending from openings in the stationary piston to the base and laterally through side portions f the base, valve elements operative in said openings and having valve stems extending therefrom and downwardly through the conduits and through openings in the lower portions thereof, and a cam shaft having cams against which the rods bear.

3. An engine of the character described comprising a stationary piston, a base, supporting means on the base for the stationary piston, a

slide piston on the stationary piston containing a combustion chamber between itself and said stationary piston, ignition means in the chamber, fuel intake and exhaust means on the stationary piston, a cylinder in which the slidable piston operates, supporting means for the cylinder, a crank shaft mounted on the cylinder and having power take-off means and connecting means between the crank shaft and the lower portion of the said slide piston, said cylinder being provided with a bifurcated block on the head portion thereof and through which the crank shaft is journaled, said power take-'oir means consisting of agear partly operating in the bifurcated block and being s'e'cur'ed to said crank shaft.

LAWRENCE L. ZOCH, Jr..

REFERENCES CITED The following references are of record in the nic of this patent:

UNITED STATES PATENTS Number Name YDate 746,212 Weatherholt Dec. 8, 1903 923,496 Cutler June 1, 1909 FOREIGN PATENTS Number Country Date l 8,924 lSWdl' 18.98 

